package collection;

import java.util.*;

public class SortListDemo {
    public static void main(String[] args) {

        List<Point> list =new ArrayList<>();
        list.add(new Point(500,600));
        list.add(new Point(100,200));
        list.add(new Point(300,400));
        list.add(new Point(-700,-800));
        System.out.println(list);

        //重写比较器方法，使用匿名内部类创建，简写代码
//        Comparator<Point> c = new Comparator<Point>() {
//            @Override
//            public int compare(Point o1, Point o2) {
//                int len1 =o1.getX()*o1.getX()+o1.getY()*o1.getY();
//                int len2 =o2.getX()*o2.getX()+o2.getY()*o2.getY();
//                return len1 -len2;
//            }
//        };
        Collections.sort(list, new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                int len1 =o1.getX()*o1.getX()+o1.getY()*o1.getY();
                int len2 =o2.getX()*o2.getX()+o2.getY()*o2.getY();
                return len1 -len2;
            }
        });
        System.out.println(list);


    }
}
